Aye, but what happens if either diode fails and conducts both ways. Is your active coil then driven by two sets of points going to ground at the same time. If the points are slightly out in gap/alignment on lobes is dwell time extended or ignition timing altered. Hmmmm.
I reckon it's easier and more reliable to do away with a coil tacho all together and use a tooth counter sender off the ring gear then tacho failure won't stop your ignition. John Martindale 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 (H) 61 2 66869075 (W) mobile: 0403 049990 email: johnja...@optusnet.com.au web: www.members.optusnet.com.au/johnjanet/Martindale.htm ----- Original Message ----- From: "Mark Jones" <flyk...@wi.rr.com> To: "KRnet" <kr...@mylist.net> Sent: Wednesday, October 11, 2006 9:05 PM Subject: Re: KR> Tach hook up question. > Thanks Colin. That explanation says it all and makes it very > clear..........